check device model end errors:
uname
lsusb | grep -i bluetooth
dmesg | grep bluetooth

get model of computer:
dmidecode -t system | grep -i "serial number"

download win 7 driver:
sudo apt-get install innoextract

extract exe:
innoextract g4wb12ww.exe

cd app/Win64/

find model and appropriate hex:
nano bcbtums-win7x64-brcm.inf

hex2hcd BCM20702A1_001.002.014.0449.0462.hex

sudo cp BCM20702A1_001.002.014.0449.0462.hex /lib/firmware/brcm/BCM20702A1-0a5c-21e6.hcd

reboot